>> reporter: this is the first bilateral trip by rex tillerson and accompanied by secretary kelly. it is a well intentional trip designed to show the cooperation with our two countries combating drug cartels and drug trafficking. but it is fraught with peril over the anger in mexico. there was a department of homeland security memos that may add for fuel to the fire. it calls for immigrants to be sent back to mexico even if they come from other country ares. mexico will not accept any decision by the united states in that regard. the policy calls for hiring 5000 border agency and 10000 ice agents. and lawen forcement empowered to perform the duties of